This telescoping encapsulated fast pack is constructed of V3c, 400# SW corrugated lined with MIL-PRF-26514, Grade C Foam. The cushion system consists of 2.75" convoluted pads on top and bottom and 2" Flat pads on the sides and ends. All foam is laminated to the corrugated. The inside dimensions of the pack are 20x14x9" with recommended max. bare item dimensions of 16x10x5", and outside dimensions of 21x15x9.5". This weighs approx. 4.9 lbs. empty and has a shipping cube of 1.732.